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Cum se calculează Spectrophotometry

Ce este Spectrophotometry?

Spectrophotometry measures light absorption: A = log(I₀/I) = εbc (Beer-Lambert law), used for quantitative analysis.

Ghid pas cu pas

  1. 1Input measured absorbance, path length, molar absorptivity
  2. 2Calculate concentration
  3. 3Generate calibration curve if multiple samples

Exemple rezolvate

Intrare
Absorbance 0.5, ε = 5000 M⁻¹cm⁻¹, b = 1 cm
Rezultat
c = A/(εb) = 0.5/5000 = 1×10⁻⁴ M

Greșeli frecvente de evitat

  • Using wrong wavelength for compound
  • Not accounting for baseline absorbance

Întrebări frecvente

What's molar absorptivity?

Characteristic of molecule at specific wavelength; tabulated values for known compounds.

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